Guide shoe for elevators



July 3, 1923.

1 ,460,404 R. BRENNE GUIDE SHOE FOR ELEVATORS Filed June 21 1920 Patented July 3, 1923.

UNITED STATES PATENT OFFHQE. I

RICHARD BRENNE, OF CHICAGO, ILLINOIS, ASSIGNOR TO KAESINER HECI-IT COIVL PANY, CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

GUIDE'SHOE FOR ELEVATORS.

Application filed June 21, 1920. Serial No. 390,324.

T all to 710% it may concern Be it knownthat I, Riel-mm) BRENNE, a

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Guide Shoes for Elevators, of which the following is a specification.

My invention relates to elevators and more specifically to an improved guide shoe for holding an elevator car in proper alinement with the shaft during its movement up and down the same. i

The general object of my invention is to guide the elevator car more quietly and smoothly than has heretofore been possible.

Another objectis to devise a shoe which will provide suitable guiding forces and at the same time allow for all irregularities in the construction of the; shaft and guide rails.

An advantage of the construction em- 1 ployed is that the wear between the guide shoe and the rail is greatly decreased, resulting in increased durability and corresponding economy. I

Further objects and advantagesof my invention willbecome apparent as the description proceeds. i 1

In the accompanying drawings Figure 1 is a side elevation and Fig. 2 a section on the line 2-'-2 of Fig. 1 of a guide shoe constructed according to my invention.

In the embodiment of my'invention selected for illustration the shoe member proper carries the usual anti-friction filler 12 which has operative engagement with the edge and part of both sides of avertical guide rail 14. Plates 15 may overlie the ends of the shoe 10 and filler 12 to hold the filler in place. The shoe member 10 is supported for rotation and reciprocation about a horizontal axis by means of a trunnion 16 slidable and rotatable in a sleeve 18. The trunnion carries a guide bolt 20 project ing through a plug 22 threaded into the rear end of the sleeve 18 and locked in position by a suitable lock nut 24. To press the shoe member toward the rail and maintain it at all times in proper engagement with the same a helical spring 26 encircles the bolt 20 having abutment against the plug 22 and the end of the trunnion 16. The compression stress of the spring may be adjusted by screwing the plug 22 in or out of the sleeve.

naled.

The movement allowed the shoe member by the mounting above secured will take care of slight displacements between the elevator car and the rail along the axis of the trunnion l6 and allow for portions of the rail which happen to be twisted slightly out of the vertical. This, however, is not suflicient to take care of the irregularities of the rail, as if any portion of'the rail is not vertical, a shifting in a horizontal direction transverse to the axis of the trunnion 16 must occur as the car moves up and down past the inclined portion of the rail. Also, if portrons of the rail are nearer the path of movement of the car than other portions; where the distance is changed the edge of the rail is not vertical but slants toward or away from the car. This would make the edge of the rail engage the filler 12 at one end of the filler only, bearing against that end with a pressure sogreat that the filler is rapidly worn away.

According to my invention I avoid the above mentioned difliculties and defects by mounting the sleeve 18 for rotation around a horizontal axis transverse to the axis of the trunnion 16 and also by allowing the sleeve 18 to reciprocate slightly. along its axis of rotation. For this purpose the sleeve 18 carries laterally directed trunnions 28 similar to the trunnion 16 and. similarly jour- The laterally directed bolts 30 are slidable through plug 32 similar to the plug 22 which guides the bolt 20 and maybe ad justed to stress the compression springs 36, and locked in position by lock'nuts 34:- To facilitate ready removal of the sleeve 18 the bearings for trunnions 28 are preferably formed in two halves, the lower halves 38 being part of a casting bolted to the frame to of the elevator car, and the upper halves 12 being suitably fastened in place by bolts 14: engaging lugs 46 formed on the two halves. It will be apparent that the axis of the shoe may be inclined slightly from the vert1cal in any plane and may shift in a horizontal direction in any plane through a limited displacement under the resilient action of the compression springs. A positive limit to the horizontal displacements of the shoe is imposed by abutment of the shoe 10 against sleeve 18, and by abutment of sleeve 18 against the bearings for trunnions 28. In normal operation such abutment does not ocour but it is a desirable safeguard-against movement ot-the car beyondthe amount allowed by its clearance in the shaft.

The guide-rail need onlybe straight and true withinthe limits imposed by the range of accommodation of the guide shoe which limits may readily be made large enough. so that the rail may easily be brought well within them. This not only eliminates the necessity for great precision in alining the portions of the rail, but insures auniform pressure between the rail and the filler which in the art.

could not be obtained with a rigid mounting for sleeve 18 by any precision practicable in such devices, and which materially reduces friction and noise and very greatly increases the life of the filler.

While I have illustrated and described in detail the preferred embodiment of my in- 201 vention,-it should be clearly understood that the disclosure is merely for purposes of illustration and that many modifications and variations Will naturally occur to those skilled cover-all such legitimate'variations and modifications.

I claim as my invention:

1."In combination with an elevator car and a vertical guide rail, a shoe carried'by said carand having-operative engagement with said rail, and means for mounting said shoe on said car, said means including resilient means for-permitting said shoe to be translated in any horizontal direction;

2. In combination With an elevator car and a vertical guide rail, a shoe carried'by said car and having operative'engagement' with said rail, and means tor'mounting aid "shoe onsaid carpermitting of'rotationandtranslation upon two mutually perpendicular axes respectively.

3. A guide shoe for elevators comprising a shoe member, a sleeve supporting said shoe member and allowing said member to rotate and shift along the axis of'the sleeve,

I aimin the subjoined claims to" trunnions on said slecveendbearings supporting said trunnions and allowlng said sleeve to rotate and shift about an axis pertrunnions in said bearing members.

5. An elevator guide shoe having, in combination, a shoe member having a'horizontal trunnion, a sleeve receiving SELlClllOIlZOlltal trunnion and having laterally directed trunnions extending at right angles to said first-mentioned trunnion, bearing members supporting saidlaterally directed trunnions, duplicate bolts extending. from the. ends of all said trunnions, duplicate plugs receiving the ends of all said bolts in sliding engagement and compression xsprings encircling said bolts and abuttingjsaidaplugsand the ends of said trunnionsto limit thedisplace ment of said trunnions.

6.-In combinatlon with an elevator car and a vertical guide rail',=a. guideshoe having operative engagement with said rail and mounting means supporting said guide shoe upon-said car, said mounting means permitting rotation of said guide shoe. around each of two mutually perpendicular horizon- ;talyaxes. and includingresilient means permitting a limited displacement of said. guide shoe in any :directionin; a horizontal plane,

and: additional. positive. Ineansi nposing a "definite :limit on. horizontal displacement of said guide shoe.

In" testimony whereof, I have hereunto set my hand.

RICHARD BRENNE, 

